<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="../../js/vue.js"></script>
</head>
<body>
<div  id="root">
    <ul>

        <input v-model="keyWord">
        <button @click="sortType = 2">年龄升序</button>
        <button @click="sortType = 1">年龄降序</button>
        <button @click="sortType = 0">原序</button>

        <li v-for="(p,index) in filPersons" :key="p.id">
            {{p.name}} -  {{p.age}}
        </li>

    </ul>
</div>

<script type="text/javascript">
<!--    用监视实现-->
    Vue.config.productionTip = false
    const  vm = new Vue({
        el:'#root',
        data:{
            keyWord:'',
            sortType:0,
            persons:[
                {id:'001',name:'马冬梅',age:'18',sex:'女'},
                {id:'002',name:'周冬雨',age:'19',sex:'女'},
                {id:'003',name:'周杰伦',age:'20',sex:'男'},
                {id:'004',name:'温兆伦',age:'21',sex:'男'},
            ],
            // filPersons:[]
        },
        computed:{
            filPersons(){
                const res = this.persons.filter((p)=>{return p.name.indexOf(this.keyWord) !== -1})
                if(this.sortType){
                    res.sort((a,b)=>{
                        return this.sortType === 1 ?  b.age - a.age : a.age - b.age
                    })
                }
                return res
        },
        }
    })
</script>
</body>
</html>